I use a "ton" on these and believe the thickness of the material has been reduced recently. They seem more "flimsy" - but still useable. Perhaps your vendor is "cheating" Stapes on the weight of the individual pocket pages? I share my ideas and projects with LOTS of people and would recommend because of convenience of source.
The shiny surface reflects light making it impossible to see material under certain lighting conditions. If you can move around when viewing you can see everything just fine. For my use I will find a matte finish next time.